/**
 *  Copyright 2012-2017 Gunnar Morling (http://www.gunnarmorling.de/)
 *  and/or other contributors as indicated by the @authors tag. See the
 *  copyright.txt file in the distribution for a full listing of all
 *  contributors.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.mycompany.mapper.util;

import org.mapstruct.Named;

import java.util.ArrayList;
import java.util.List;

/**
 *
 * @author Sjaak Derksen
 */
public class IterableNonInterableUtil {

    @FirstElement
    public <T> T first( List<T> in ) {
        if ( in != null && !in.isEmpty() ) {
            return in.get( 0 );
        }
        else {
            return null;
        }
    }

    @LastElement
    public <T> T last( List<T> in ) {
        if ( in != null && !in.isEmpty() ) {
            return in.get( in.size() - 1 );
        }
        else {
            return null;
        }
    }

    @CollectElement
    public <T> List<T> collectToList1( T in ) {
        List<T> res = new ArrayList<>();
        res.add(in);
        return res;
    }


    @Named("collectToList")
    public <T> List<T> collectToList2( T in ) {
        List<T> res = new ArrayList<>();
        res.add(in);
        return res;
    }


}
